Keystones — Lintel
Five GCSE retrieval questions · 28 February 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00089 in standard form
Answer: 8.9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 24
Answer: (x - 2)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 60°. Find adjacent side
Answer: 11cm -
4. Ratio Mixed ratio problems
£280.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £200.00 -
5. Statistics Mean
Calculate the mean of: 5, 6, 18, 50, 31, 9. Give your answer to 2 decimal places
Answer: 19.83